Process for mineral processing of low-grade silicon calcium collophanite

Abstract

The invention discloses a process for mineral processing of low-grade silicon calcium collophanite. The process sequentially comprises smashing, ball milling, flotation decarburization, positive flotation roughing, reverse flotation roughing and reverse flotation scavenging. A specific collecting agent and a foaming agent are added into silicon calcium collophanite pulp in the flotation process. The process has the advantages that 1) high-grade phosphate concentrate can be obtained from low-grade phosphorite raw material, the influence of organic carbon on positive and reverse flotation is reduced, the effect of agent adsorption by organic carbon is eliminated, the production cost is reduced, and the grade of phosphate concentrate is improved; 2) the collecting agent is improved, so that the flotation efficiency is improved, the normal temperature flotation is achieved, and the flotation temperature is reduced from 35 DEG C to 17-25 DEG C; 3) due to the adoption of nonhazardous and efficient agent, concentrate water and tailing water are not treated, are subjected to closed cycle and are not discharged, and zero emission is achieved.

Description

technical field [0001] The invention relates to a beneficiation process, in particular to a low-grade siliceous-calcium colloidal phosphate ore beneficiation process. Background technique [0002] Phosphate rock is the main raw material for the production of fertilizers. In recent years, the resources of high-grade low-magnesium easy-to-separate phosphate rocks in various countries in the world are becoming less and less. Therefore, the beneficiation technology of phosphate rocks is an indispensable technology for the development and utilization of phosphate rocks. At present, the beneficiation technologies of phosphate rock mainly include: "scrubbing and desliming" process, "roasting and digestion" process, "chemical leaching" process, "dense medium separation" process, "flotation" process, etc. [0003] In my country, there are many lean ores, few rich ores, more refractory ores, and less easy ores. More than 80% of the phosphate rocks are refractory collophosphine. Huna...

AI Technical Summary

Problems solved by technology

[0008] But still there are some shortcomings in this prior art: 1), there is no decarburization link, can not effectively remove the carbon element in the ore

Although part of the carbon element can be removed in reverse flotation and forward flotation, because there is no special decarbonization link, the carbon removal is not thorough enough, which affects the flotation effect, resulting in a decline in the concentrate grade and high beneficiation costs

[0009] 2) The product obtained by the reverse-positive flotation process is a foam product, and there are problems in concentration. At the same time, the reverse flotation process is used in the first link of the phosphate rock. After the phosphate rock is suppressed, when the positive flotation is carried out again, Difficult to flotation, unsatisfactory beneficiation effect

[0011] Although this application discloses the process of flotation decarburization first, then forward flotation desiliconization and reverse flotation demagnesia, the effect of the flotation agent used needs to be further improved, especially for low-grade phosphate rock raw materials

In addition, this patent application cannot solve the problem that flotation is carried out at normal temperature

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